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TLS Online TPP Program

#Question id: 10468

Why are stomata required in leaf surface?

#Unit 6. System Physiology – Plant
  1. requirement is a critical adaptation to avoid desiccation
  2. requirement for air passout
  3. required to prevent water from draining out
  4. required to prevent take in too much water 
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TLS Online TPP Program

#Question id: 23801

#General Aptitude

The hexadecimal number system consists of the symbols
TLS Online TPP Program

#Question id: 861

#Unit 1. Molecules and their Interaction Relevant to Biology

Alexander Varshavsky discovered, the half-lives of many cytoplasmic proteins vary with the identities of their N-terminal residues via the so-called N-end rule:-

A. Destabilizing N-terminal residues Asp, Arg, Leu, Lys, and Phe have half-lives of

i. Only 2 to 3 minutes,

B. Stabilizing N-terminal residues Ala, Gly, Met, Ser, Thr, and Val have half-lives of

ii. >10 hours in prokaryotes

iii. >20 hours in eukaryotes.

TLS Online TPP Program

#Question id: 14477

#Unit 13. Methods in Biology

Probability of a card drawn at random from an ordinary pack of cards to be club card is
TLS Online TPP Program

#Question id: 12604

#Unit 10. Ecological Principles

Which of the following ecosystems would likely have a larger net primary productivity/hectare? 
TLS Online TPP Program

#Question id: 12095

#Unit 10. Ecological Principles

It is now thought that the atmosphere of the primitive Earth was composed largely of carbon dioxide, nitrogen, and water vapor. The composition of certain iron-containing minerals suggests that the carbon dioxide began to be replaced by oxygen about 2 billion years ago.   Which of the following is the best explanation for the change in atmospheric composition?